2-Digit Subtraction Sentences

Subtraction Equations: Learn

An equation is a mathematical statement such that the expression on the left side of the equals sign (=) has the same value as the expression on the right side. An example of an equation is 60 - 40 = 20.

One of the terms in an equation may not be know and needs to be determined. Often this unknown term is represented by a letter such as x. (e.g. x - 40 = 20).

The solution of an equation is finding the value of the unknown x. To find the value of x we can use the additive equation property which says: The two sides of an equation remain equal if the same number is added to each side.


x - 50 = 70
+50 +50
x = 120

Check the answer by substituting (120) for x in the original equation. The answer is correct if the expressions on each side of the equals sign have the same value.

120 - 50 = 70
70 = 70 (Correct!)

Subtraction Sentences: Practice

What number would complete the equation?


- =

Press the Start Button To Begin

You have 0 correct and 0 incorrect.

This is 0 percent correct.


Game Name Description Best Score
How many correct answers can you get in 60 seconds? 0
Extra time is awarded for each correct answer.
Play longer by getting more correct.
How fast can you get 20 more correct answers than wrong answers? 999